Airsoft Canada - View Single Post - WE M4 GBBR - Trademark lower doesn't fit blank upper, is that normal?

tome · April 7th, 2015, 08:44

Hi,

I have a factory open-bolt m4 with a blank body and a spare receiver set which seems to be a v1 Colt trademarked, originally close bolt.

The uppers and lowers don't fit when switched between sets. Is this normal or do I have a (or both) misshappen receivers. Is there some modification I can make to make them fit?

Thanks for any advice.

April 7th, 2015, 08:44	#1
tome Trader rating Join Date: Sep 2007 Location: Toronto	WE M4 GBBR - Trademark lower doesn't fit blank upper, is that normal? Hi, I have a factory open-bolt m4 with a blank body and a spare receiver set which seems to be a v1 Colt trademarked, originally close bolt. The uppers and lowers don't fit when switched between sets. Is this normal or do I have a (or both) misshappen receivers. Is there some modification I can make to make them fit? Thanks for any advice. __________________ aka - Donkey Balls